It's called Leftover Swap and lets users barter or give away leftover food. Users simply download the free app, snap a photo of whatever food they have leftover and want to give away or trade and the app distributes the image to other users in the geographical area.

"It's obviously not for everybody," Leftover Swap co-founder Dan Newman told NPR. "But for as many people who seemingly have a problem with it, there's people who love the idea."

The basic gist is this: Let's say you have some leftover pizza. Snap a photo of it and post it to the app's database. Strangers in the same geographic market then have an option of trading you for the food — or just taking it off your hands.

Newman says the original idea for the app started as a joke in 2010, but then they quickly realized that that there many be a demand for such an app, considering the amount of food Americans waste on a daily basis.

The app originally launched in August, but the latest version launched in October.

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